Gearing.



W. SGHELLENBAGH.

GEARING.

APPLICATION FILED OCT. 28, 1912.

Patented Oct. 7, 1913.

4 SHEETS-SHEET 1 W., SGHBLLENBAGH.

GEARING.

APPL'IOATION FILED OCT. 28, 1912.

Patented Oct. 7, 1913.

4 SHEETS-SHEET 2.

Wane/Mao *AYM.

W. SGHELLENBAGH.

GEARING. APPLICATION FILED OUT. 28, 1912.

1 74 1 9 Patented Oct. 7,1913.

4 SHEETS-SHEET 3.

wi/ime/aow W. SOHELLENBAGH.

GEARING.

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WILLIAM SCHELLENBACH, OF HARTWELL, OHIO.

GEARING.

Application filed October 28. 1912.

To all uiaomz'i may concern:

. Be it known that 1, WILLIAM SCHELLEN- BACH, a citizen of the United States, residing at Hartwell, in the county of Hamilton and State of @1110, have lnvented certain new anduscfui Improvements in Gearing, of

whicl the following is a specification.

Th invention relates to improvements in speed change gearing as of the type used in machine tools, and it deals with an organization and modification such that, notwithistanding the provision of a very compact structure, the range of speed changes may elements, the underlying principles and gist of construc ion of the English-metric change system specified in my copending application Serial No. 728,327, filed of even dateherewith, and at the same time to effect certain improvements therein tending to as high an order of simplicity and compactness as may be consistent with the extended capacity of the invention,

Another object is to eifect an improve ment in the cone gearing organization, such that the same will consist of fewer parts than have heretofore been employed, and

will be noteworthy for an enhanced strength and sturdiness in the parts.

Another object is to render available a gear box, in the form of a unitary structure, which would be characterized by an extended range of speed changes, while at the same time enabling a shift from an English to a metric standard.

Other objects and advantages will be in part pointed out in the following description, and in part rendered apparent therefrom in connection with the drawings accompanying this disclosure.

In order that this invention may be so fully disclosed to those skilled in this art that they may be enabled to embody the same in vaifious forms and modifications Specification of Letters Patent.

Patented (Pct. "5,1913.

Serial No. 728,326.

to which it is readily subject, drawings exemplifying a preferred form have been ap-.

pended as a part of this disclosure, and in such drawings, like characters of reference denote corresponding parts throughout all of the figures, of which Figure 1 is a front elevation showing a structure embodying the features of'this invention assembled and applied to a lathe.

Fig. 2 is a vertical section. taken transversely along line 22, of F 1, showing the gears used for evaluating the ratio ofthe system to enable metric threads to be cut when such gears are operatively connected with the organization. Fig. 3 is a section taken transversely through the gear box along line 3-3 of Fig. 1, showing certain details of an arrangement for connecting in and out a speed change compound gearing. Fig. at is a section taken transversely through line et'l, of Fig. 1, showing the arrangement of the lever that operates to connect and disconnect the ratio evaluating gearing from the system when it is desired to, change from English to metric cutting, or conversely. Fig. 5 1s a section taken along line 5-5, of

Fig. 1 showing more clearly the mounting I of the tumbler gear lever and parts connected therewith, whereby the same is more rigidly mounted than heretofore, and-certain strains are removed from the shaft from which the tumbler gear is usually driven. Fig. 6 is an end elevation of the head stock and bed of a lathe showing the arrangement of the reverse mechanism and other compounding gears and also showing the location of the interchangeable gear that is used when the system is changed from English to metric, or conversely. F i 7 is an upright section following line 7-7 of Fig. 6, showing in cross section the relation of the reversing gearing and the compounding gearing at the end of the head stock. Fig. 8 is a horizontal section taken along lineS-8, Fig. 6, showing ingeneral assembly the first compoundgears, the cone of gears and tumblerjorganization, as well 'as elements of the metric-English change mechanism. Fig. 9 is a partial elevation of the gears at the end of'the head stock, together with a section taken through line 99 of Fig; 6. I

Continuing now by way of a more complete disclosure of the underlying principles and features of this invention, it may be stated that the description, while directed largely to specific details, is to be taken in an illustrative or explanatory sense, rather than in a limiting sense, inasmuch as the features of the inventionmay assume dif ferent forms from that shown, as will be readily comprehended by those skilled in the art in, the light of this disclosure.

By way of example, the invention has been shown applied to that type of machine tools known as an engine lathe. The end of the lathe bed is indicated by l on Fig. 6 and, arrangedon appropriate guides thereof, is the head-stock indicated by 2. In this head-stock is journaled a spindle 3 that carries the gear 4; at its left hand end. Mounted' on an appropriate portion of the head-,

stock, preferably directly underlying the spindle, as shown by Fig. 7 is a bearing piece 5, on the end of which is pivoted a plate 6, having an operating handle 7, shown I more clearly by Fig. 6, that serves to shift the same for reversing purposes as will presently be made apparent. This shift plate carries a pivot pin 8 on which is journaled the direct motion gear 9 that meshes with the gear 4 when the plate 6 is positioned, as shown by Fig. 6. A second gear 10 permanently meshes with the gear 9 and is also carried'on the plate 6 by means of the pivot pin 11, so that when the-plate 6 is swung upwardly by the handle '7 the gear 9. will be disconnected from. gear land the gear 10, which normally acts as an idler, will now be brought into-meshwith gear l, and thus serve as a means instrumental in reversing 'the direction of'gearv9, without, however,

4 lation with the bed of the lathe, as by means of the lug 16,bolted to the casing of the tumblergear box, which is in turn bolted to the bed of the lathe. Through this stationary block 15 is arranged a bearing'pin 17 that at its ends pivotally carries the cage 18, in which is mounted certain compound gears, as will be presently described. This cage, together with said gears, is adapted to-be rocked by the handle 19 at the end of the arm 20 and a bolt 21 serves to lock thesame in such position as it may have been placed.

Journaled in the cage 18 is a pin 22 on which is keyed a small gear 23 and on which is slidably splined a lar e gear 24:. This gear 24 is adapted to be set into any one of three positionsby-means of the-finger piece 25,. for the purpose of enabling three speed changes to. be effected at this point, as will. now be explained.

Referring to Fig. 7, it will be observed that gear 24 is shown in mesh with gear 14.

This indicates the-extreme right hand position of gear 24 and gives the first speed. If the finger piece 25 be pulled out to shift the gear 24 into a plane coincident with that of gear 13, then by swinging lever 19,

these two gears may be approached and caused to mesh, thus yielding the second speed. Now, if the gear 24; be moved to its extreme left hand position it will entirely clear. gear 13 and by swinging the lever 19 8 further, the gear'23 may be brought into mesh-with gear 14, giving the third speed of the system. These speeds. are transmitted to the gear box 27 containing the cone of gears and the metric-English change sys- 55 tem by means of the intermediate gear 26- that isjournaled on the spindle block 15 and constantly meshes with gear The gear box 27, together with its contained elements, is preferably constructed in the form of a structural unit and it is bolted to the main frame or bedof the machine in a suitable manner. In describing this arrangement, it will be convenient first to follow the order shown inthe accompanying drawings, wherein the elements are arranged-to cut English threads.

In cutting English threads the motion from the gear 26 is transmitted by the gear 28 shown in this instance keyed to the end of anelongated gear 29 that has a bearing in the wall of the gear box 27 and is also rotatably journaled on a shaft 30; whose right hand end is fixed to gear 31, which is in turn fixed to the lead screw 32, and is also jonr- 1 5 naled in the frame of the'gear box 27. The gear 28 is held on the sleeve of the gear 29 by means of a removable pin or slotted washer, so that it readily may be taken ofi and interchanged in position on another 1 0 shaft, and at the same time maintained in mesh' with the driving gear 26. In the mounting shown in the drawings, the elongated gear 29 is, of course, suitably driven independently of any rotary motion possessed by the shaft 30, by reason of its connections through the gear 28. By a suitable tumbler arrangement, this motion is in turndirectly transmitted to the selected one of any of the gears A, B, C,-etc., which con- 12o stitute a cone of gears, each 'of'which' insures a rate-of movement in this direct drive corone of a predetermined responding to any series of pitches threads.

By the for-m of standard English 5 of tumbler mechanism here disclosed, 'anaim has been made to transmit a considerable amount of power for high duty work, without imposing any more strain than is necessary-on the shaft 30"." 139 dental with the axis of the shaft '30.

emma this end, the tumbler mechanism is carried directly from the frame of the gear box 27 and provision is made whereby it will swing about a center coincidental with the axis of the shaft 30.

Referring-to Figs. 4, 5 and 8, 33 and 34 indicate lower and upper horizontally extending guide ways pmvided by the gear box and, mounted to slide laterally on'these guide ways, is a traveling block 35. This block in. turn provides a circular guide way 36 that iscurved about a center coinci- A tumbler gear support 37 is in turn fitted to the circular, segment guide 36, and by means of an operating handle 38, it may be moved up and down on the traveling block 35, and it may be shifted-laterally by sliding the block "35; the whole ,moving as a unit. The tumbler gear support 37 carries apin 39 on which is journaled a tumbler gear 40 and, from. the*foregoing,it will be perceived that this gear 40 will constantly mesh with the gear 29 irrespective of any position of the handle38. "To enable the operator, however, :to bring gear 40 into proper mesh with any one ofthe gears A,

B, C, etc., a plate 41is secured-t0 the gear box and such plate provides a series-of internal grooves indicated on Fig. 1' by dotted lines 42, and it also provides an external series of holes A, 'B,-C, eto., corresponding to the respectivegears of the cone'of gears. .The arm ofthetu-nibler gear support carries a key 43, which may be brought toenter any one ofthe grooves 42, thus insuring that the tumbler gear40 will be brought in the same .radial plane as that o-f-the selected gear and by continuing the swing of the arm 38, the'pin 44, carried thereby will enter one ofthe series of holes and. thus accurately determinethe:proper relation of the pitch lines of the gears. Motion may be thus transmitted froin't'he gear 29 to any one of the cone of gears and, as the latter are allkeyed toa shaft 45 jou-rnaled in the gearbox, such shaft will be rotated-at a rate depending'upo-n which of the gears A,- B,

' C, etc. is in mesh.

'A description will now be givenof the means whereby the motion of the cone gear shaft- 45 may be transmitted to the lead screw 32 through acompound'gearing enabling a series o'fjfurther speed changes-to be made, fixed to the end of the sha'ft'45 is a collar 46 that provide's'a clutch47. Journaled on the-shaft 45 is also a sleeve48 that is normally "free to rotate independently of i such shaft, and which, when in the position shown'by Fig. 9, may 'be locked'torotate with said shaft by means offthe clutch '47.

In this position, therefore, this -sleeve'48 acts as though fixedto the shaft 45, and it in'turn 3 is telescoped-by-asleeve 49 that is splined thereto, and 'is rotatably retained against'lateralshift by its-mounting intlie bearing 50 ont-he gear box. This sleeve. 49

i also provides-the smaller gear 51, theintermed1ate'52, and the larger gear 53; any, one

of whichanay be brought into operative connection with the lead screw. To enablethis to be accomplished, the sleeve 54 is rota-tjaby journaled on the shaft 30 and "terminates at-its right hand end in clutch: 55 that new meshes with a corresponding.clutch onitl' e gear31, so that wheat-he sleeve "54 is driven, it will, through the'gear 31 drive the lead screw 32. Keyed onto the slee'veh4fisfa s'ec- 0nd sleeve 56, on which in turnis splineda gear 57 having the clutch 58 at it's right hand end aswell as theclutch '59 at lits'lefthand end. Any motion transmitted to' thje gear 57 will therefore positively drive tlie 7 if shaft 30 through the sleeve 56. fanat c sleeve 54. In the position shown by Fig. 9, the gear '57 is in mesh with gear 52, and,

therefore, the shaft 30 is driven at a'rate oorrespondin-gto the ratio between the; last mentioned gears. Means is provided, however, whereby the gear 57 may be slipped laterally, unmeshed from gear 52fi-I1Clfl1- gaged to be driven-either by the gear the gear 61. This is accomplished by means of the yoke block 62.,having a rack 63 in'its upperface in mesh with the teeth on a pinion 64, which may be actuated from the' front of the gear box by the thumb nut 65. This actuating member "62 slides'on thebearin'g surface 66-of the gear boxand preferably carries an idexpoint 67, to show the opera tor which of the gears are in mesh, i. what speed ratios willprevaiL- I It will be observed that shown the gears 60 and 61 revolve idly, but

when gear 57- is moved, sayto the left, the

clutch 59 will engage with a counter partmember on the gear -6(), -sothat the gear-53,

in f the position which is inconstant mesh with gear 60,-will gear 57 be movedto the end of the-shaft 45,-wh-ieh-is the sat-media, i

'tsneeas the shaft"30"from -the center 50f" gear. 26, so that itwvill first drive sha.ft.'45. The

gears A, B, C, etc., are now each first driven, and through the tumbler gear 40 their Inc'- tion is transmitted to the elongated gear QS),

which latter will rotate (independently "of the shaft30) at a rate determined by which of the gears A, B, C, etc., is in meshnglTh e' purpose of driving in reverse ordenthrough the gears aforesaid, is to reverse the sched ale on the index plate so that'thelatter man be used in the conventional manner by those &

following the practices of the metric system,

as has been more fully explained in the above mentioned eo-pending application.

In continuing this description, it will be convenient to employ lower case alphabeti-' cal characters in denoting the parts other than those mentioned in the foregoing, so as more clearly to differentiate the functions of the elements peculiar to the metric system.

Referring to Fig. 4, the mounting of a system change lever a will be rendered apparent. l'llhis lever projects from an upwardly extending rock shaft b that is journaled in this instance at the back of the gear box and carries upper and lower rack sleeves c and at, both of which are keyed to the shaft 6. The upper rack sleeve 0 meshes with a collar e, (see Fig. 8) that is journaled on the sleeve 54, so that by moving the lever a to the left, the sleeve 54 will be similarly moved and disconnect the clutch 55, andthen engage the clutch f at the left hand end of the sleeve 54 with a counterpart member on the elongated gear 29. The sleeve 54 isnow driven directly from' the gear 29, and it will in turn transmit motion through gears 60 and 53, or 57 and 52, or 61 and 51, to sleeve 48, according to the position of the gear 57. So far as explained, the

shaft is not connected up to rotate, but

when the lever a is swung to the left the rack sleeve d, through its engagement with the rack gear 9, will move the sleeve 48 to the left and disconnect the clutch 47. On the right hand end of this sleeve is a gear h that now comes into mesh with a gear 7:: that is journaled on a pin Z, as shown by Fig 8 Fixed to rotate with gear is is a companion gear m that is in constant mesh with gear 31, so that such gear 31 is now driven and as .it is keyed to the lead screw the latter in turn will be actuated. It may be noted that the gears h,'k, m, and'31 constitutea' ratio evaluating gearlng which introduces v the proper constant into the system so that those accustomed to English or to metric standards.

\Vhat I claim and desire to secure by Let- .ters Patent is 1. A structure of the naturegdisclosed combining a first shaft, a gear mounted thereon, a second shaft,a' cone of gears keyed thereto, a tumbler gear. establishing connection therebetween, driven member on said second shaft, a drivlngmember on sa1d first shaft, means for connecting said driving and driven members respectively directly with their shafts, and alternative means for gearing said driving member directly to said second shaft and gearing said driven member to said first shaft.

2. A structure of the nature disclosed dombining a shaft, a gear journaled thereon and adapted to rotate independently of said shaft, a cone of gears, a tumbler gear for connecting said gear to any one of said cone of ears, and gearing intervening between sai cone of gears and said shaft to enable the former to drive the latter.

3. A structure of the nature disclosed combining a shaft, a gear journaled thereon and adapted to rotate independently of said shaft, a cone'ofgears, a tumfbler gear for connectingsaid gear to any-one of said'cone of gears, and speed change gearing adapted to establish a driving connection between said cone of gears and said shaft.

4. A structure of the nature disclosed combining a shaft, a gear journaled thereon and adapted to rotate independently of. said shaft, a cone of gears, a tumbler gear; for connecting said gear to any one of said cone of gears, gearing between said conepf gears and said shaft, and a clutch for connecting said gearing with said shaft.

5. A structure of the nature disclosed combining a shaft, a gear journaled thereon and adapted to rotate independentlyof said shaft, a cone of gears, a tumbler gear for connecting said gear to any one of said cone ,of gears, a sleeve journaled on said shaft, gearing between said sleeve and said cone of gears, and clutch mechanism for enabling said sleeve to be connected either with said first mentioned gear or said shaft.

6. A structure of-the nature disclosed combining a shaft, a gear journaled thereon and adapted to rotate independently of said 'shaft a cone of gears, a tumbler for con-.

nectihg said gear to any one of said cone of gears, gearing intervening between sa1d gear and sa1d shaft, and clutch mechanism for establishing connection between said'gear and gearing and between said gearing and shaft.

7 ..A structure of the nature disclosed combining a shaft, a gear journal ed thereon and adapted to rotate independentlyof said shaft, a co-ne of gears, a tumblen for connecting said gear to anyone of said cone of gears, a speed change system of gears, and

means for establishing a driving connection between said first mentioned gear, said system-andsaid shaft.

8. A structure of the nature disclosed combining a first shaft, a gear journaled thereon, a second shaft, a cone of gears fixed thereto, a tumbler gear therebetween, an-

' momma other gear,. a clutch for connecting said gear wlth sa d cone of gears, and means for establishing or interrupting an operating driving connection between said other gear.

thereon, a second shaft, a cone of gears fixed thereto, a tumbler therebetween, a sleeve ]ournaled"on said first shaft, a clutch for connecting said sleeve wlth said first mentioned gear, another sleeve journaled on sand second shaft, and gearing between said other sleeve and said first shaft establishing driving connection therebetween.

11. A structure of the nature disclosed combining a first shaft, a gear journaled thereon, a second shaft, a cone of gears fixed thereto, a tumbler therebetween, a sleeve journaled on each of said shafts, gearing establishing driving connection between said sleeves, and shifting mechanism for connecting the one sleeve wit-h the first mentioned I gear and the other sleeve in driving'conncction with said first shaft, or for connecting both sleeves to their respective shafts.

12. A structure of the nature disclosed combining a first shaft, a gear journaled thereon, a second shaft, a cone of gears fixed thereto, a tumbler therebetween, a first sleeve journaled on said first shaft, a second sleeve journaled on said second shaft, gearing between said sleeves, and means for locking each sleeve toits shaft or for establishing connection to drive said first shaft from said first mentioned gear through each of said sleeves in' succession.

13. An apparatus of the nature disclosed combining a casing, a supporting member arranged to slide thereon andhaving aclr- I 14-. A structure of the'nature disclosed zombining a shaft, a cone of gears mountedthereon, asecond shaft, a gear supported thereon, means for operatively connecting said gear with. any one of the gears of said cone, an actuating gear mounted equidistant from said shafts,'and a gear adapted to be interchanged in position from the one to the other. of said shafts operatively to connect either of said shaft with said actuating gear.

15. A structure of the nature disclosed combining a shaft, a cone of gears mounted thereon, a second shaft supporting-a gear, means for op'eratively connecting said gear with any one of the gears of said cone, an

actuating gear mounted equidistant from said shafts, a power driven spindle, speedchange gearing connecting said spindle with said actuating gear, and a gear adapted to ,be interchanged in position from the one to the other of said shafts operatively to connect either of said shafts with said actuating. gear.

16. An apparatus of the nature disclosed combining a casing, a supporting member arranged to slide thereon and having a circular guide segment, an operating lever slidably retained by said segment, a gear pivotally supported on said lever, a shaft -arranged with its axis coincidental with the center of curvature of said segment, and an elongated gear on said shaft meshing continuously with said other gear irrespective of the position of the latter.

17. An apparatus of the nature disclosed combining'a casing providing a series of stops, a supporting member arranged to slide horizontally thereon and having an upwardly extending circular guide segment, an operating lever slidably retained by said segment, a catch on said lever adapted to be brought into engagement with any one of said stops, a gear pivotally supported on saiddever, a shaft arranged with its axis coincidental with the center of curvature of said segment, and an elongated gear on said shaft restrained against longitudinal displacement and continuously meshing with said other gear irrespective of the position of the latter.

In testimony whereof, I have hereunto set my hand.

WILLIAM SCHELLENBACH Witnesses:

OLIVER B. KAISER, CLARENCE B. FOSTER. 

